1475128

Appears in sequences

• Let a(n) be the least k such that in the prime power factorization of k! the exponents of primes p_1, ...,p_n are even, while the exponent of p_(n+1) is odd.at n=25A240537
• a(n) is the smallest k such that in the prime power factorization of k! at least the first n positive exponents are even.at n=20A240620
• a(n) is the smallest k such that in the prime power factorization of k! at least the first n positive exponents are even.at n=21A240620
• a(n) is the smallest k such that in the prime power factorization of k! at least the first n positive exponents are even.at n=22A240620
• a(n) is the smallest k such that in the prime power factorization of k! at least the first n positive exponents are even.at n=23A240620
• a(n) is the smallest k such that in the prime power factorization of k! at least the first n positive exponents are even.at n=24A240620
• a(n) is the smallest k such that in the prime power factorization of k! at least the first n positive exponents are even.at n=25A240620
• a(n) = numerator(Sum_{k=1..n} 1/P(k)), where P(k) = A006530(k) is the greatest prime dividing k for k >= 2, and P(1) = 1.at n=17A378678